The invention discloses a cup water supply device capable of being used by multiple people. The device comprises a casing consisting of an upper casing and a lower casing, wherein an accommodating groove is formed in the upper casing, the top of the lower casing is arranged in the accommodating groove, a water storage part is arranged in the lower casing, an accommodating cavity is formed in the lower casing below the water storage part, a driving box is fixedly arranged in the lower casing at the bottom of the accommodating cavity, a driving cavity is formed in the driving box, a driving disc is connected in the driving cavity in a rotary fit manner, a first sliding groove and a second sliding groove are formed in front and back sides of the driving cavity in a communicated manner, via holes communicated with the bottom of the accommodating cavity are formed in tops of the first sliding groove and the second sliding groove, a first accommodating groove is formed in the right inner wall of the first sliding groove, and a second accommodating groove is formed in the left inner wall of the second sliding groove. The device is simple in structure and convenient to move and carry, automatic telescoping work of a first sliding guide pipe and a second sliding guide pipe can be automatically controlled, automatic mounting and dismounting can be realized, later maintenance can be facilitated, the service life can be prolonged, and the work efficiency can be improved.